Single-disk drill.



No. 736,440. PATENTED AUG. 18, 1903. J. M. PIERCE.

SINGLE DISK DRILL.

APPLICATION FILED MAY 7. 1903.

X0 MODEL,

W Awe/1727' X I James N. P/rc UNITED STATES" Patented August 1a, 1903;

PATENT OFFICE.

.lJAM-ES M. PIERCE, OWATONNA, MINNESOTA, ASSIGNOR TO OWATONNA MFG. CO.,-OF OWATONNA, MINNESOTA, A CORPORATION.

SINGLE-DISK DRILL.

SPECIFICATION forming of Letters Patent No. 736,440, dated August 18, 1903.

Application filed May 7, 1908. Serial No. 155.985. (No model.)

.To all whom it may concern.- I Be it known that 1, JAMES M. PIERCE, of Owatonna, inthe county of Steele, State ofi -Minnesota, have invented certain new and 5 useful improvements in Single-Disk Drills,

of which the following is a specification.

The object of my invention is to provide a simple eflicient means for changing the position of the disk with respect to the direction jxo oi draft to cultivate more or which the drill is used.

The invention consists generally in Various constructions and combinations, all as here inafter described, and,particularly nointed out-in the'claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a plan View of a singlet disk, its boot, a drag-bar, and the means for connecting the boot to the drag-bar. Fig. 2 is a similar view showing the disk adjusted in a difierent position. gFig. 3 is a side elevation, and Figs. 4 and 5 are details of the adjustable parts.

Inthe drawings, 2 represents a single disk less the soil in :5 journaled'on a boot 3 of the usual construction.' It is customary to provide some means for changing the position of the disks with respect to the direction in which they are moving, according to the character of the soil where the drill is used. Sometimes the disk will be set nearly in line with the drag-bar,

as shown in Fig. 2, and in such cases a narrow furrow will be made in the soil, and the disk willnot cultivate to any extent. It frequently happens, however, that the soil is such that the user of the machine desires to cultivate it while seeding, and the disk is then set at a considerable angle to the drag-bar, as

shown in Fig. 1, and as the machine is moved 4:) over the field the disks will thoroughly cultivate the soil. It is sometimes desirable to set all the disks at the same angle, and in some cases it may be desirable to set them at difierent angles, and I therefore provide means whereby each disk is adjustable independently of all the others, so that the angle of any one disk can be changed without regard to the position of the others, or all of them may be changed and set at the same angle, if preferred.

My improvement therefore consists in prozon tally, a drag-bar having a similar surface viding a curved lug 4 on the front of the boot, said lug having a series of transverse grooves 5 in its curved surface, and on the drag-bar 6 I secure a casting 7, having an end portion 5 8, curved substantially on the same'radius as the curve of the lug 4 and provided with a transverse rib 9, that is adapted to fit the grooves 5 therein. Bolts 10 secure the casting 7 to the'drag-bar, and a bolt 11, passing 6o through a slot 12 in the end 8 andintoa hole 13in the log 4, secures the curved parts to-,

gether, but permits the adjustment of the end 8 on the surface of the lug 4. By loosenw ing the bolt 11 and changing the position of 6 the end'8 it is evident that the angle of the disk with respect to the drag-bar will be changed also. Fitting the rib 9 into one at the grooves 5 will adapt the disk foruse in;

one kind of soil, and the adjustment of the .rib in another groove will change the angle of the disk and render it more efiicient in another soil. For general use the rib will be set in the middle groove, but can be readily adjusted to fit the others whenever desired.

I claim as my in'vention- 1. In a single-disk drill, the combination, with a boot, of a disk mounted therein, alug on said boot having a surface curved horito fit said lug, and means adjustably securing said log and drag-bar together, substantially as described. 7

2. In a single-disk drill, the combination, with a boot, of a disk mounted thereon, a lug secured to said boot and provided with a surface curved horizontally and having a series of transverse grooves, a drag-bar provided with a curved surface to fit the surface of said lug and having a transverse rib to fit the grooves therein, and means adjustably securing said drag-bar to said lug.

3. In a single-disk drill, the combination, with a boot, of a disk mounted the1'eon,.a curved lug formed integrally with said bootand having a series of transverse grooves inits curved surface, a drag-bar, a casting, secured thereto having a curved end to fit the curved surface of said lug, a transverse rib provided on said curved end to fit the grooves of said lug, and a bolt passing through said lug and through a slot in said curved end and adj nstably securing thmparts together,

provided with a curved surface to fit thesurface of said boot, and means adjustaolgg securing said surfaces together.

5. In a disk-drill, the combination, with a boot and a lug projecting substantially in a horizontal direction therefrom and having a curved roughened so rface, of a disk journaled in. said boot, and a drag-bar having a curved surface to coincide with the surface of said lug, and means for adjustahly securing said drag-bar and lug together.

6. The combination, with a drill-boot havscenes ing a surface curved horizontally, of a disk journaied in said boot, a drag-bar having a curved surface to coincide with the corresponding surface of said boot, and means securing said surfaces together.

7. The combination, with a drill-boot and a lug thereon having a surface curved horizontally, of a disk, a drag-bar having a surface to coincide with the surface of said lug, and means securing said lug and said draghar together. 7 4

In witness whereof I have hereunto set my hand this 20th day of April, 1903. JAMES M. PIERCE.

In presence of- RICHARD PAUL, S. V. GRIFFIN. 

